Production of Biodiesel Using Calcite Stone as Support Catalyst

Talebi, Morteza | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53414 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Khorasheh, Farhad; Larimi, Afsanehsadat
  7. Abstract:
  8. The aim of this study is developing and investigating heterogeneous catalysts based on natural calcite for the transesterification of canola oil and methanol in order to produce biodiesel as a renewable and alternative fuel for fossil fuels. At first calcite was calcined at high temperature to decompose calcium carbonate to calcium oxide. Afterward, Mg-Zr/CaO catalysts were prepared with mass ratio of 2:1 Mg:Zr and different weight percent(2.5, 5,7.5 and 10 wt%) on calcite supported by impregnation method. In order to characterized synthesized catalysts used different analysis such as energy dispersive X-ray (EDX) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller surface area (BET), thermo-gravimetric analysis (TGA) and the Hammett indicator method. The effects of operational conditions such as the dosage of catalyst consumed and methanol /oil ratio at constant temperature and time, were investigated. Also stability and reusability of optimum catalyst was examined. According to the results, the highest biodiesel yield was obtained using the 7.5%Mg-Zr/CaO-700 under the reaction condition (catalyst loading of 8 wt.% ,methanol/oil molar ratio of 12:1 and 65 oC for 3 h). In addition, the optimum catalyst (7.5%Mg-Zr/CaO-700) showed high ability and reusability in successive reaction cycles
  9. Keywords:
  10. Canola Oil ; Biodiesel ; Heterogeneous Catalysis ; Calcite ; Magnesium ; Zirconium ; Transesterification Reaction ; Biodiesel Production

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